Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)

Understanding the variation of the ophidian vertebral morphology is an essential tool in snake paleobiology, but so far this field remains hardly investigated. A major problematic is the still scarce knowledge about the basis of homogeneity of intracolumnar shape variation along the vertebrae of the...

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Autores principales:	Sarris,Ioannis, Marugán-Lobón,Jesús, Chamero,Beatriz, Buscalioni,Ángela D
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2012
Materias:	Intracolumnar variation Russells viper Axial skeleton Serial homology Vertebral morphology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400018
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spelling	oai:scielo:S0717-950220120004000182013-06-20Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)Sarris,IoannisMarugán-Lobón,JesúsChamero,BeatrizBuscalioni,Ángela D Intracolumnar variation Russells viper Axial skeleton Serial homology Vertebral morphology Understanding the variation of the ophidian vertebral morphology is an essential tool in snake paleobiology, but so far this field remains hardly investigated. A major problematic is the still scarce knowledge about the basis of homogeneity of intracolumnar shape variation along the vertebrae of the precloacal region in these animals. For instance, this variation can be overwhelmingly low in cases such as in vipers, for which it seems almost impossible to describe a concrete regionalization of the precloacal region without ambiguity. This study has applied geometric morphometrics to analyze if the shape variation of the vertebrae of the precloacal vertebrae of an adult specimen of Daboia russelli allows differentiating any sort of parcellation within the column of this organism. We have also explored if size is associated with the organization of vertebral shape along the axial skeleton. The multivariate analyses showed that the main pattern of vertebral shape variation in D. russelli concerns the neural spine and the hypapophysis, whereas the shape of the vertebral centrum appears to be nearly invariant along the series. Our analysis also showed that the precloacal region can be sudivided into two portions that merge in a transitional boundary of largest vertebrae in the middle of the column. From this middle region towards the distal ends of the column vertebrae become smaller changing their shapes in two antithetical ways.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.30 n.4 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400018en10.4067/S0717-95022012000400018
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Intracolumnar variation Russells viper Axial skeleton Serial homology Vertebral morphology
spellingShingle	Intracolumnar variation Russells viper Axial skeleton Serial homology Vertebral morphology Sarris,Ioannis Marugán-Lobón,Jesús Chamero,Beatriz Buscalioni,Ángela D Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
description	Understanding the variation of the ophidian vertebral morphology is an essential tool in snake paleobiology, but so far this field remains hardly investigated. A major problematic is the still scarce knowledge about the basis of homogeneity of intracolumnar shape variation along the vertebrae of the precloacal region in these animals. For instance, this variation can be overwhelmingly low in cases such as in vipers, for which it seems almost impossible to describe a concrete regionalization of the precloacal region without ambiguity. This study has applied geometric morphometrics to analyze if the shape variation of the vertebrae of the precloacal vertebrae of an adult specimen of Daboia russelli allows differentiating any sort of parcellation within the column of this organism. We have also explored if size is associated with the organization of vertebral shape along the axial skeleton. The multivariate analyses showed that the main pattern of vertebral shape variation in D. russelli concerns the neural spine and the hypapophysis, whereas the shape of the vertebral centrum appears to be nearly invariant along the series. Our analysis also showed that the precloacal region can be sudivided into two portions that merge in a transitional boundary of largest vertebrae in the middle of the column. From this middle region towards the distal ends of the column vertebrae become smaller changing their shapes in two antithetical ways.
author	Sarris,Ioannis Marugán-Lobón,Jesús Chamero,Beatriz Buscalioni,Ángela D
author_facet	Sarris,Ioannis Marugán-Lobón,Jesús Chamero,Beatriz Buscalioni,Ángela D
author_sort	Sarris,Ioannis
title	Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
title_short	Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
title_full	Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
title_fullStr	Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
title_full_unstemmed	Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)
title_sort	shape variation and allometry in the precloacal vertebral series of the snake daboia russelli (viperidae)
publisher	Sociedad Chilena de Anatomía
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400018
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Shape Variation and Allometry in the Precloacal Vertebral Series of the Snake Daboia russelli (Viperidae)

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